._dash-loading {
    color: transparent;
    position: fixed;
    width: calc(8 * 40px);
    height: calc(6 * 40px);
    top: 50vh;
    left: 50vw;
    transform: translate(-50%, -50%);
    background-image: url("/assets/加载动画示例.gif");
    background-repeat: no-repeat;
    background-size: 100% 100%;
}

._dash-loading::after {
    content: '';
}